Yealink SIP-T48G Administrator's Manual page 822

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
802
22-XML Group
23-Group Pickup
24-Multicast Paging (only applicable to CP860 IP phones)
27-XML Browser
28-History
30-Menu
32-New SMS
33-Status
34-Hot Desking (only applicable to SIP-T48G/T46G/T29G/T19(P) E2 IP phones)
38-LDAP (not applicable to SIP-T19(P) E2 IP phones)
40-Prefix
41-Zero Touch
43-Local Directory
45-Local Group
47-XML Directory
50-Phone Lock
51-Switch Account Up (not applicable to SIP-T19(P) E2 and CP860 IP phones)
52-Switch Account Down (not applicable to SIP-T19(P) E2 and CP860 IP phones)
61-Directory
66-Paging List
For ext keys:
Valid types are: